A major Supreme Court ruling on congressional redistricting has California’s most prominent Democrats quaking in their boots. The high court on Wednesday struck down Louisiana’s electoral map , finding the Pelican State unconstitutionally added a second majority-black House district . The ruling effectively makes it harder to use claims of racial discrimination as the primary factor when drawing political maps that favor certain voters. Gov. Newsom criticized the Supreme Court ruling. Nathan Posner/Shutterstock California Gov. Gavin Newsom portrayed the ruling as a rollback of voting rights for minority groups. “The Supreme Court majority continues to gut the Voting Rights Act and vital protections for our democracy and fair representation,” he wrote on X. Newsom is the face of the state’s own gerrymandering effort to combat Trump-backed congressional redistrictings in red states like Texas. A view of the U.S. Supreme Court building.…